Check out this video from APS:

What are metallic foils?  Metallic Foils are made from a thin layer of non-reactive metallic sheets that are fused to a clear cellophane sheet. These beautiful foils can be transferred to the surface of your choice with the help of our foil adhesives , as well using a heat setting with an iron (for fabrics). These foils allow you to control the amount of foil that is transferred, whether you want a full transfer or partial transfer. What foil colors & designs do you have?  We